Academic Commons Search Resultshttp://academiccommons.columbia.edu/catalog.rss?f%5Bauthor_facet%5D%5B%5D=Takahashi%2C+Taro&f%5Bdepartment_facet%5D%5B%5D=Lamont-Doherty+Earth+Observatory&f%5Bsubject_facet%5D%5B%5D=Physical+oceanography&q=&rows=500&sort=record_creation_date+desc
Academic Commons Search Resultsen-usCarbon dioxide sequestration in deep-sea basalthttp://academiccommons.columbia.edu/catalog/ac:162065
Goldberg, David S.; Takahashi, Taro; Slagle, Angela L.http://hdl.handle.net/10022/AC:P:20654Mon, 10 Jun 2013 00:00:00 +0000Developing a method for secure sequestration of anthropogenic carbon dioxide in geological formations is one of our most pressing global scientific problems. Injection into deep-sea basalt formations provides unique and significant advantages over other potential geological storage options, including (i) vast reservoir capacities sufficient to accommodate centuries-long U.S. production of fossil fuel CO2 at locations within pipeline distances to populated areas and CO2 sources along the U.S. west coast; (ii) sufficiently closed water-rock circulation pathways for the chemical reaction of CO2 with basalt to produce stable and nontoxic (Ca2+, Mg2+, Fe2+)CO3 infilling minerals, and (iii) significant risk reduction for post-injection leakage by geological, gravitational, and hydrate-trapping mechanisms. CO2 sequestration in established sediment-covered basalt aquifers on the Juan de Fuca plate offer promising locations to securely accommodate more than a century of future U.S. emissions, warranting energized scientific research, technological assessment, and economic evaluation to establish a viable pilot injection program in the future.Climate change, Physical oceanography, Energydsg1, tt7, als207Lamont-Doherty Earth ObservatoryArticlesCO2 Transport in Deep Waters Off Wilkes Landhttp://academiccommons.columbia.edu/catalog/ac:152882
Takahashi, Taro; Chipman, David W.http://hdl.handle.net/10022/AC:P:14783Thu, 27 Sep 2012 00:00:00 +0000The densest waters in the world ocean are formed on the continental shelf areas around Antarctica by ice formation and by the loss of heat and water to the air. The Weddell Sea (e.g., Gordon, 1971; Carmack and Foster, 1975; Foldvik et al., 1985), the Ross Sea (e.g., Jacobs et al., 1970, 1985) and other continental margin areas such as the coasts of the Adélie and Wilkes Lands (e.g., Gordon and Tchernia, 1972; Carmack and Killworth, 1978; Foster, 1995) are known to be the major producers of these dense waters. These waters spill over the shelf edge and, during their descent, mix with components of Circumpolar Deep Water (CPDW) to form the Antarctic Bottom Water (AABW) that fills the major abyssal basins of the world ocean. This process constitutes an important pathway between the atmosphere and the abyssal ocean for long-term storage of CO2. However, the CO2 transport processes associated with bottom-water formation have not been well documented. Here, we present observations made during the 1992 World Ocean Circulation Experiment (WOCE) S4P cruise showing that atmospheric CO2 taken up by Wilkes Land shelf waters is transported into the upper AABW.Physical oceanography, Atmospheric sciencestt7, dwc3Lamont-Doherty Earth Observatory, Earth and Environmental SciencesArticles